[En-Nut-Discussion] ENJ28J60

[Richard Sloan]

I would like to connect a MP3 decoder that is SPI and also the ENC28J60... that is SPI so it would be nice to be able to do both on seperate SPI ports, but I do stream MP3 off a MMC/SD card into the SPI MP3 IC all on one SPI....

> From: bengt at florin.se> To: en-nut-discussion at egnite.de> Subject: RE: [En-Nut-Discussion] ENJ28J60> Date: Wed, 24 May 2006 17:46:58 +0200> > Correct, AVR is capable of 8MHz SPI.> The LPC family is not.> > As a matter of fact I first wanted to connect ENC28J60 to a LPC2106.> This seemed like a perfect couple, small and powerful.> However the LPC divides clock by 8 for fastest SPI clock, yielding only> 7.5MHz.> Whether that is close enough to 8 Microchip support couldn't tell.> > To be honest the errata says the SPI clock could be lower if it is> synchronous to 28J60 chip clock, but I'm not sure it will be synchronous> enough as LPC has a PLL driven clock. And then you have to run the LPC on> 25MHz crystal.> > Otherwise the LPC family is one of my favorite ARM7 right now. It runs ARM> code at full speed directly from FLASH. That means you don't have to bother> to put your time critical interrupt code in SRAM and you may compile all> your code in ARM mode without any performance penalty like for the SAM7> family.> > Can't really understand why Atmel didn't implement some MAM-like feature.> But maybe I'm the only person on the planet still not compiling Thumb code.> > Wasting half the CPU bandwidth for nothing is not my game.> > So what we look for is when LPC comes with integrated Ethernet 6 PHY.> Or else we go for the Coldfire solution, but that's another thread.> > /bengt> > -----Original Message-----> From: en-nut-discussion-bounces at egnite.de> [mailto:en-nut-discussion-bounces at egnite.de] On Behalf Of Richard Sloan> Sent: den 24 maj 2006 15:54> To: Ethernut User Chat (English)> Subject: RE: [En-Nut-Discussion] ENJ28J60> > Yes this 8Mhz is not good, so you would need 16Mhz XTAL on AVR and SPI> doubler on.... and just get 8Mhz....>  > Another interesting part is LPC2124 16/32 bit ARM7TDMI-ST with 256K Bytes> Program Flash, 16K Bytes RAM, RTC,4x 10 bit ADC 2.44 uS, 2x UARTs, I2C, 2x> SPI, 2x 32bit TIMERS, 7x CCR, 6x PWM, WDT, 5V tolerant I/O, up to 60MHz> operation >  > Nice 2 UART, 2 SPI and 60Mhz!>  > www.olimex.com has inexpensive boards for it with ethernet, and its fast!>  > Also parts are available at Digikey for it also.> > > > > From: bengt at florin.se> To: en-nut-discussion at egnite.de> Subject: RE:> [En-Nut-Discussion] ENJ28J60> Date: Tue, 23 May 2006 10:27:00 +0200> > Also> the current status of the ENC28J60 (Rev B4) silicon makes it> practically> unusable for most CPU's, as the SPI interface doesn't work> properly for> clock rates under 8MHz.> > Silicon Rev B5 is said to correct this, but> Microchip has yet not announced> when this will be available.> > Also, I> agree to Haralds comment. Power consumption is way too high.> > Another> interesting CPU to port Nut to would be the Freescale Coldfire> MCF52235, a> true single chip solution as it also contains an Ethernet PHY.> > I remember> reading some comments from Erik Lins to port Nut to Coldfire> MCF5282.> Well> yes, it was back in 2004. Time flies.> > Any interest of, or progress in the> Coldfire direction?> > /bengt> > -----Original Message-----> From:> en-nut-discussion-bounces at egnite.de>> [mailto:en-nut-discussion-bounces at egnite.de] On Behalf Of Harald Kipp> Sent:> den 22 maj 2006 09:39> To: Ethernut User Chat (English)> Subject: Re:> [En-Nut-Discussion] ENJ28J60> > Hello Richard,> > At 17:43 21.05.2006 -0400,> you wrote:> >MIcrochip ENC28J60 Has anyone been able to use this IC with> Ethernut? Been > >considering making a Ethernut board and using this, but I> am terrible at > >writing drivers... I see code to operate the IC in the> AVRlib,> > After Erik Lins pointed me to the electrical characteristics,>> namely the operating current, I lost my interest in this chip.> > >also any> drivers for the newer MP3 IC's from VLSI 1002 or 1003?> >> > Due to missing> hardware (Medianut still uses the old VS1001K),> we never worked on an> update. I agree that this is very sad.> > Harald> >> _______________________________________________> En-Nut-Discussion mailing> list> En-Nut-Discussion at egnite.de>> http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion> > >> _______________________________________________> En-Nut-Discussion mailing> list> En-Nut-Discussion at egnite.de>> http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion> _________________________________________________________________> Express yourself instantly with MSN Messenger! Download today it's FREE!> http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/_____________> __________________________________> En-Nut-Discussion mailing list> En-Nut-Discussion at egnite.de> http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion> > > _______________________________________________> En-Nut-Discussion mailing list> En-Nut-Discussion at egnite.de> http://www.egnite.de/mailman/listinfo.cgi/en-nut-discussion
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